“We know pets are an important member of the family, and we are focused on the well-being of all animals we transport. Delta is conducting a thorough review of the situation and have been working directly with Alejandro’s family to support them however we can,” the airline said in a statement.

“As part of that review, we want to find out more about why this may have occurred to ensure it doesn’t happen again, and we have offered to have Alejandro evaluated by a veterinarian to learn more,” the statement added.

Evan Oshan, an attorney who is representing Alejandro’s owner, Michael Dellagrazie, told NBC New York he was in Detroit trying to get Alejandro’s remains, as Delta has yet to return them.